Canon A.M. l^ioiman on Bn'tinh Amphipoda. 141 



mining my North Atlantic allied forms I find Talorch&stia 

 longicornis (Say) and Talorchestia me(/alophthalmns (Bate) 

 from N.E. America (received under these names from S. I. 

 Smitli) to be true Talorchesfire, in which the males have the 

 first gnathopods subchelate and similar in structure to those 

 of Orc/iestia, and thus quite different from the two species we 

 are now considering. From Cadiz 1 have examples of 

 rchestoidea Fischerii (M. -Edwards) given me by Signer 

 Bolivar under that name. In this species, as in those which I 

 here call Orchestoidea DeshayesH and Orchestoidea hrito, there 

 is a close correspondence in the character of the first gnatho- 

 pod male, which is not subchelate, for the end of the hand is 

 not expanded to receive the impact of the finger, but both 

 the hand and the wrist bear a tubercle on the margin. The^e 

 tubercles may prove general throughout the genus; but 

 whether they exist in the type Orchestoidea taberculata, 

 Nicolet, I have no means of ascertaining. It is a question 

 whether the two genera ought to be maintained. It is not 

 necessary to go beyond Sfebbing's species in the paper re- 

 ferred to, where in Talorchestia novce-hollandice, Stebbing, we 

 have a characteristic species of Talorchestia, in T. Desha'jesii 

 what I take to be an Orchestoidea, and in T. tridentata, 

 Stebbing, an intermediate form, but one which, if the genera 

 are to be kept distinct, must be retained in Talorchestia. 



Fani. II. Lysianassidse. 



Genus 1. NORMANION, J. Bonnier. 



= Norinania, Boeck (jiec Bowerbauk). 



17. Normanion quadrimanus (Bate & VVestwood). 



18C8. Opis quadrimana, Bate & "Westwood, (1) vol. ii. p. 503. 

 187G. Normania quadrimana, Boeck, (138) p. 188, pi. vi. fig. 3. 

 1890. Normania qtiadrimayia, Sars, (142) p. 32, pi. xiii. fig. 1. 

 1893. Nonuanion quadrimajius, J. Bonnier, " Les Amphipodes du 

 Boulonnais, III.," Bull. Sci. France et Bel^ique, vol. xxiv. p. 1G7. 



Ilah. Isle of Cumbrae, 20-2.) fath. (.4. M. JS.) : Afas. Nor. 

 JSear Devaar Island, Firth of Clyde {T. S.). 

 Distrib. South and West Norway {G. 0. S'lrs). 



Genus 2. AciDOSTOMA, Lilljeborg. 



18. Acidohtoma obesum (Bate). 



1861. Anonyx ohesm, Bate & Westwood, (1) vol. i. p. 98. 



1865. Acidostoma obesmi, Lilljeboig, " Ou Li/sianassa ma(/eUanica and 



Amphipoda li/sianassina,'" Nov. Act. Soc. Sci. Upsal. ser. 3, p. 34, 



pi. V. 

 1890. Acidostoma ohesun, Sars, (142) p. 38, pi. xiv. fig. 2. 



J^ah. Shetland {A. M. N.) • Banft'(r. Edward) : Mus. Nor. 

 Isle of Cumbrae(/^. R.) ; St. Andrews {Mcintosh) ; between 



